Hisense LCD3204EU, LCD3703EU Schematic

LCD3703EU CHASSIS SERVICE MANUAL (V1.0)

JUL. 13 2005

INNOVATION IS LIFE

CONTENTS

•

SAFETY PRECAUTION

•

PRODUCT SAFETY NOTICE

•

PRODUCT FUNCTION

•

LCD PANEL SPEC.

•

BLOCK DIAGRAM

•

CIRUIT DIAGRAM

•

SOFTWARE UPDATING

•

FAQ

•

SPARE PARTS

INNOVATION IS LIFE

SAFETY PRECAUTION

WARNING:

Service should not be attempted by anyone unfamiliar with the necessary precaution on this receiver.The following are the necessary precaution to be observed before serving this chassis.

1.Since the power supply circuit of this receiver is directly connected to the AC power line ,an Isolation transformer should be used during any dynamic service to avoid possible shock hazard.

2.When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in place, such as : non-metallic control knobs, insulating cover,shields, isolation resistor capacitor network etc.

3.When replacing parts or circuit boards, disconnect the power cord.

4.When replacing a high wattage resistor (oxide metal film resistor ) on the circuit board, keep the resistor(1/2in) away from circuit board.

6.Connection wires must be kept away from components with high voltage or high temperature.

7.If any fuse in this LCD TV receiver is blown , replace it with the FUSE specified in the chassis part list.

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PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the chassis have special safety-related characteristics. These characteristics are often passed unnoticed by a visual inspection. When replacement parts are required, be sure the service technician uses replacement parts specified by us that have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock, injury to persons or other hazards. This LCD TV product should be situated away from heat source such as radiation, stoves, or other product that produce heat.

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PRODUCTFUNCTION

- Back connections

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PRODUCT FUNCTION

Note: The above figures are for reference only, please refer to the actual units to determine their appearance.

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PRODUCT FUNCTION

LCD-TV features

•

Multimedia - TV receiver, Video monitor and PC display, all in one.

•

Wider viewing angle, over 176 view angle

•

Digital display device - truthfully reproducing the images, without distortion

or blurring, irrespective of magnetic or geomagnetic effect.

•

200 channels storage

•

Sleep timer

•

Teletext with 252 pages memory and fastext feature

•

NICAM/A2 sound

•

Three SCART interface

•

Multi-language OSD

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LCD PANEL SPEC.

General Description

－ The LC370W01 is a Color Active Matrix Liquid Crystal Display with an integral Cold Cathode Fluorescent

Lamp(CCFL) backlight system. The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive type display operating in the normally black mode. This TFT-LCD has a 37.02 inch diagonally measured active display area with WXGA resolution (768 vertical by 1366 horizontal pixel array). Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arranged in vertical stripes. Gray scale or the brightness of the sub-pixel color is determined with a 8-bit gray scale signal for each dot, thus, presenting a palette of more than 16.7M(true) colors with 8Bit.

－ The LC370W01 has been designed to apply the 8Bit LVDS interface. － It is intended to support LCD TV, PCTV where high brightness, wide viewing angle, high color saturation,

and high color are important.

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LCD PANEL SPEC.

General Features

Active Screen Size 37.02 inches diagonal

Outline Dimension 960.0(H) x 111.0(V) x 590.0(D) mm(Typ.) Pixel Pitch 0.42675(H) x 0.42675(W)

Pixel Format

Color Depth 16.7M colors Luminance, White 500 cd/m2 (Center 1 points typ.)

Contrast Ratio 600:1

Viewing Angle(CR>10)

Power Consumption

Response Time 16ms

Display Operating Mode

Surface Treatment

1366 horiz. By 768 vert. Pixels RGB strip arrangement

View Angle Free (R/L 176(Typ.), U/D 176(Typ.))

Total 200 Watt (Typ.)

Transmissive mode, Normally Black

Hard-Coating (3H), Anti-Glare, Reflectance < 2%

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BLOCK DIAGRAM

Chassis Block Diagram

LVDS CONNECTOR

1

12

…

INVERT

1

12

POWER SUPPLY +24V

…

1

AC 230V INPUT

POWER BOARD

30

LCD PANEL

Power connector +12V +5V standby

+5V/M

Power conntrol Bri. control

I/O CONTROL

+15V +12V +5V

AV IN/OUT

To lcd panel lvds connector

LCD PANEL POWER SUPPLY IS +12V(CHECK POINT)

MAIN BOARD

IIC BUS R/G/B/FB

VIDEO INPUT

TUNER BOARD

Sound Amp.

Connect to speaker

Connect to earphone

130

RS232

DVI-D INPUT

D-SUB 15PIN

RF

V

U

Y

Scart3 VIDEO IN/OUT

Remote control Key button

S-video

Scart2 VIDEO IN/OUT

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Scart1 CANNAL+ RGB IN

AUDIO INPUT

R

L

BLOCK DIAGRAM

VIDEO Processing part

RS232

H/V

VGA

R/G/B

Y

Pb/Cb Pr/Cr

DVI

RF

ANT.IN

S-VHS

Channel+

SCART2

RGB/CVBS

SCART1

Y/C

CHANNAL+

YC/CVBS

SCART3

24LC21

PI5V330

VIDEO SWITCH

VPC3230D VIDEO DECODE

N006

PI5V330 VIDEO SWITCH

FLI231

HY57v6

0

43220

R/G/B/FB

VPC3230D VIDEO DECODE

N010

ST232

FLI231 0

N015

H/V

8 BIT ITU656

VIDEO & H/V

SDA5550M TXT DECODE

8 bit

SST39VF040 FLASH MEMROY

K4D263238F DDR MEMORY

N018

N012

GM1601

Video Processing

Build in MCU

Slave IIC BUS

AM29LV040 PROGRAM

62WV5128BLL

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29LV040B EEPROM

N019

LVDS

LCD PANEL

KEYPAD

IR

BLOCK DIAGRAM

AUDIO Processing part

SCART AUDIO

AV AUDIO PC AUDIO

TV AUDIO

Main IIC BUS

POWER part

AC 230V 50/60HZ

PFC

MSP3410G AUDIO Processing

N506

+5V

DC/DC

+12V

+24V

DC/DC

+15V

L7808CV

N501

PANEL POWER

Inverter POWER

+8V

L R

+15V

L

R

+8V

L7805CV

N502

TDA2822M Earphone AMP.

N503

OUTPUT 5W+5W

TDA7266B AMPLIFIER

N505

TDA7053AT Earphone AMP.

N504

LM1117-3.3

LM1117-2.5

+5V

+3.3V

+2.5V

LM1117-3.3

LM1117-1.8

Supply for Tuner/MSP3410

+3.3V

FOR GM1601

+1.8V

MAIN BOARD

DC/DC

+5V (Standby )

LM1117-1.8

LM1117-3.3

LM1117-2.5

+1.8V

+3.3V

+2.5V

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Tuner Board